baber/WOPTO huggingface dataset:
Patent KR-20010087648-A (KR)
Title: Circuit for removing dc offset
Inventor: CHOI JUN HYEOK
IPC: G05F1/565
Filed: 2000-03-08
Abstract: PURPOSE: A DC offset removal circuit is provided, which can prevent the waste of data and thus increases a transmission efficiency. CONSTITUTION: A buffer part buffers a positive signal(P) and a negative signal(N) being output from an IF(Intermediate Frequency) signal processing part. A low pass filter(LPF) part detects a DC level of the positive signal and the negative signal from the buffer part. And an offset control part controls an offset by adjusting the DC level of the positive signal and the negative signal using a DC level difference between the positive signal and the negative signal detected from the low pass filter part. The buffer part comprises the first buffer part buffering the positive signal and the second buffer part buffering the negative signal. The first buffer part uses the positive signal from the IF signal processing part as the first input and uses its own output as the second input after feeding back the output. The second buffer part uses the negative signal as the first input and uses its own output as the second input after feeding back the output.
Patent KR-20000030696-A (KR)
Inventor: HWANG CHEOL HUI
Filed: 2000-03-13
Abstract: PURPOSE: A virtual real estate auction method on the internet is provided so that a plurality of users can trade virtual real estates through auction on the virtual space. CONSTITUTION: In a state that a plurality of virtual real estates are distributed to each of the subscribers(201), a subscriber inputs firm nam, desired price and auction closing date for his virtual real estate if he wants to sell the real estate through auction(203). Other users searches the virtual real estate for sale(205). In a state that a variety of sales information are registered in a bid information DB, a subscriber searches a sales board through a web server after accessing an auction service system(207). The web server, in response to this, displays a list for each of the sales in the form of web page(209). If the subscriber selects desired sales among various virtual real estates displayed on the web page(211), the web server, in response to this, reads image data, owner, bidding price, etc., from the bid information DB and transmits them to the subscriber terminal(213).
Patent KR-20000062916-A (KR)
Title: 기타의 브리지 기구
IPC: G10D3/04
Filed: 2000-03-16
Abstract: 본 발명은 새들 수용 홈과 새들의 적어도 하나의 측면과 홈 사이에 배치된 중간 부재를 갖춘 메인 브리지 몸체를 포함하는 기타의 브리지 기구에 관한 것이다. 각각의 현이 새들을 통과하는 중간 부재 내에 배치된 제 1의 홈 또는 오목부와, 중간 부재가 새들과 접촉하는 오목부 사이의 제 2 영역이 제공됨으로써, 브리지 몸체로의 현의 진동 전달이 감소되고 진동이 새들 아래에 배치된 픽업에 직접 전달된다. 또다른 실시예에서는, 오목부가 새들 위에 제공되며, 새들의 양쪽에 중간 부재가 제공된다. 모든 오목부는 새들을 향하는 홈의 표면 내에 형성된다.
Patent KR-20010089010-A (KR)
Title: Method and apparatus for protecting screen of TV
Inventor: LEE SEUNG JIN
IPC: H04N5/445
Filed: 2000-03-20
Abstract: PURPOSE: A screen protection device and a method of a TV is provided to be capable of preventing the damage of a CPT of a TV by performing a screen protection function if still video signals are input for a long time. CONSTITUTION: An analog signal processor(100) receives and processes analog broadcasting signals. A digital signal processor(200) receives and processes digital broadcasting signals. A video signal processor(300) converts output signals of the analog signal processor(100) or the digital signal processor(200) into video signals which can be displayed on a screen. A screen protection controller(400) determines whether video signal output from the video signal processor(300) are still video signals through predetermined sampling. A controller(600) performs a screen protection function when the still video signal is sensed by the screen protection controller(400).
Patent KR-20010092519-A (KR)
Title: Opticaldisk signal recording device for laser display
Inventor: LEE SEONG JUNG
IPC: G11B20/04
Filed: 2000-03-22
Abstract: PURPOSE: An optical disc signal recorder for laser display is provided to record various signals for laser display by editing freely each characteristic of figures or characters for laser graphic display. CONSTITUTION: A sine wave generator(101) generates a sine wave for recording a signal. A step form wave generator(102) generates a step form wave for recording a signal. A synthetic wave generator(103) generates a synthetic wave for recording a signal. A computer data output portion(104) outputs laser graphic data of a computer. An electronic organ signal output portion(105) outputs an electronic organ signal. An editor(106) combines selectively signals output from the sine wave generator(101), the step form wave generator(102), the synthetic wave generator(103), the computer data output portion(104), and the electronic organ signal output portion(105). An oscilloscope(107) displays figure data and character data output from the editor(106) on a monitor. A laser head(109) displays the figure data and the character data output from the editor(106) on a screen. An analog recorder(110) stores recording data output from the editor(106) to a master tape(111). A disc mastering portion(112) forms a master disc by mastering the master tape(111).
Patent KR-20010090201-A (KR)
Title: Method for providing ordering type CD title and the system
Inventor: LEE GEON BEOM
IPC: G06F17/00
Filed: 2000-03-23
Abstract: PURPOSE: A compact disk title on demand providing system and method is provided to enable all users to use and execute a compact disc title without lowering of speed even though several users access to the identical compact disc title at the same time. CONSTITUTION: A server provides information on the internet. A file server is interlocking with the server and stores a compact disc title in the form of title. A title on demand server provides information on an IP(Internet Protocol) address, an ID, a password and a position of the title of the compact disc title stored in the file server. A user database authenticates whether a user who made the title on demand server a request for the generation of the title is a lawful user.
Patent KR-20010006975-A (KR)
Inventor: KIM DAE HUN
IPC: G06K9/00
Filed: 2000-04-10
Abstract: PURPOSE: An iris recognition method by a reaction of pupil and an autonomous nerves ring is provided to discriminate the iris of human quickly and exactly by outputting numerous recognition parameters for an iris recognition according to fibrous tissue of the iris, a reaction of the pupil and the autonomous nerves ring about light, a form of the autonomous nerves ring, and a location and a form of the pupil. CONSTITUTION: Firstly, a user is certified through a card number or a personal identification number by retrieving a database. Next, a location of a camera and numerous light sources are controlled according to a personal information of the certified user, and a stop image and a moving image of an iris are acquired. After this, parameters for a certification are outputted by performing a wavelet conversion of a video signal of a region related to an iris analysis of the acquired stop image. And, region of the pupil and an autonomous nerves ring is detected from the acquired moving image, and parameters for certification are outputted by calculating a dynamic reaction of the pupil and the autonomous nerves ring, and the user is certified by means of the parameters according to the moving image. Next, a region of the autonomous nerves ring is detected from the selected iris image, and parameters are outputted according a form of the region of the autonomous nerves ring. At this time, in case of existing a deterioration pupil, after detecting a region of the deterioration pupil, the user is certified by outputting a location and a form of the detected deterioration pupil.
Patent KR-20010100297-A (KR)
Inventor: CHOI CHEON HAENG
Filed: 2000-04-11
Abstract: 본 발명은 도막보호용 도포형 아크릴 필름조성물에 관한 것으로서, 더욱 상세하게는 아크릴로니트릴, 아크릴레이트 및 에폭시계 메타크릴레이트 중에서 선택된 아크릴 단량체를 수용성 에멀젼 중합하여 얻어진 아크릴 에멀젼은 내열성, 내알칼리성, 내한성, 내매연성 및 내철분성이 우수하고, 보호하고자 하는 도막에 분사 도포하는 경우 도막과의 탈착도 용이하여 일반 제품의 표면을 보호하도록 널리 적용될 수 있는 도막보호용 도포형 아크릴 필름조성물에 관한 것이다.     또는, 아크릴 단량체에 특정의 내산성 및 내수성 강화제를 함유시킴으로써 자동차 및 산업 기계제품 분야에 특히 적용될 수 있다. 
     이에, 본 발명의 도막보호용 도포형 아크릴 필름조성물은 자동화된 도포형 노즐방식에 의해 도막제조가 용이하고, 에멀젼의 분산매로 물이 사용되므로 작업 후 폐수가 발생되지 않아 환경 오염을 억제할 수 있는 특징이 있다.
Patent KR-20000077036-A (KR)
IPC: D21F3/00
Filed: 2000-04-18
Abstract: A resin-coated endless belt (16) for a long nip press(10) has a base which is a polymeric film structure in the form of an endless loop with an inner surface (52), an outer surface (54), a transverse direction and a longitudinal direction. The polymeric film structure has a plurality of perforations (56) which may be aligned in one or both of these directions. The polymeric film structure is stretched in the presence of heat to orient the molecular chains in the unperforated intervals between the perforations to provide the structure with tenacity and resistance to further stretching. At least the inner surface (52) of the base (polymeric film structure) is coated with a polymeric resin material, such as polyurethane. The polymeric resin material coats the base and upon curing, forms a mechanical interlock therewith by virtue of the perforations, and renders it impermeable to oil and water. In addition to being useful for a long nip press, the belt may also be used in other papermaking applications, for example, as a calender belt on a calender of the shoe type or on a calender having two or more rolls, or as a transfer belt. <IMAGE>
Patent KR-20010097972-A (KR)
Inventor: HWANG DONG SEON
IPC: H04N9/77
Filed: 2000-04-27
Abstract: 본 발명에 따른 영상표시기기의 색좌표 자동 조정방법은, 외부 휘도 최대 위치 및 외부 콘트라스트 최대 위치를 결정하는 단계와, 상기 단계 후 9300K 색좌표 조정을 시작하여 적,녹,청색(R/G/B)의 백 라스터 9300K 색좌표를 조정하는 단계와, 상기 백라스터 색좌표 조정단계 후 백 라스터 휘도를 조정하고 적,녹,청색 드라이브 9300K 색좌표를 조정하는 단계와, 상기 드라이브 색좌표 조정 단계 후 콘트라스트를 조정한 다음 ABL을 조정하는 단계와, 상기 ABL조정단계 후 색좌표 9300K에서의 측정된 컷오프, 드라이브, 콘트라스트 값을 기초로 하여 색좌표 4000~10000K 의 디폴트 데이터를 계산 한 후 이를 자동 저장하여 색좌표 조정이 완료되는 단계를 포함하는 것을 특징으로 한다. 
     이 같은 본 발명에 의하면, 9300K의 색좌표를 기본값으로 하여 4000~10000K 까지의 데이터 갭을 구하여 컷오프, 드라이브, 콘트라스트에 대한 디폴트 데이터로 저장하여 이를 화면에 뿌려 줄 수 있도록 함으로써, 색좌표의 3가지 온도 6500K, 7200K, 7300K를 각각 조정하여야 하는 기존의 방법보다는 색좌표 조정시간이 단축될 뿐 만 아니라, 색온도 4000~10000K 사이의 색좌표를 사용자에게 제공해 줄 수 있는 효과가 있다.
Patent KR-20010103352-A (KR)
Inventor: AHN BYEONG GUK
Filed: 2000-05-09
Abstract: 본 발명은 10×10×0.5 t mm, φ6×0.5 t mm의 크기를 갖는 미소시험편을 이용하여 고온 구조물(화력발전설비, 석유화학설비, 원자력설비 등)의 대표적인 재질열화 (Material Degradation)기구인 고온 크리프(Creep) 거동을 평가하기 위한 시험장치와 평가 방법에 관한 것이다. 즉, 고온 소형펀치(Small Punch; SP)지그, 가열로 장치(Furnace Device), 정하중 부하장치(Constant Loading Device), 미소변위 측정장치(Linear Variable Differential Transducer; LVDT), 냉각장치(Cooling Device), 제어장치(Control Device) 등으로 구성하는 것을 특징으로 하는 그리고 박판형 시험편을 소형펀치지그의 상부다이와 하부다이 사이에 고정시킨 후 시험편 상부에 φ 2.4mm의 세라믹 구를 놓고 이를 통하여 직접 부하하는 것을 특징으로 하는 소형펀치-크리프 시험장치와 미소시험편을 사용하여 고온 크리프 곡선, 초기 변형량, 정상상태의 크리프 속도, 하중지수, 크리프 파단수명, 크리프 수명소비율, 크리프 활성화에너지, 몬크만-그랜트(Monkman-Grant) 지수 등과 같은 고온설비용 내열재료의 크리프 특성을 평가하는 방법으로 구성되어 있다. 
     이러한 본 발명은 국내의 가혹한 고온 실기부재에 대한 대표적인 열화기구인 고온 크리프 특성을 매우 작은 미소시험편에 의해 준 비파괴적으로 평가 가능하며, 에너지 변환설비에 대한 현상태의 크리프 특성 평가에도 적용할 수 있다.
Patent KR-20010109368-A (KR)
Inventor: KIM SEOK WON
Filed: 2000-05-29
Abstract: 본 발명은 인터넷 상에서 운영되는 입찰시스템을 통하여 개인, 기업 또는 단체가 특정 프로젝트를 아웃 소싱하기 위한 목적으로 프로젝트를 구성하는 제반 기술들을 포함하는 기술 모자이크를 구성하도록 함으로써 인터넷 입찰 시스템에서 기술 컨소시엄의 거래를 중개할 수 있도록 하는 기술 컨소시엄의 구성 방법과 장치에 관한 것이다. 
     기술 컨소시엄의 입찰 등록자가 인터넷 입찰시스템에 원하는 프로젝트와 정해진 카테고리별로 상기 프로젝트와 관련된 기술들을 등록하도록 하고, 입찰에 참여하고자 하는 입찰 희망자는 입찰에 참여하기 전에 해당 프로젝트를 구성하는 기술들을 그룹으로 묶어서 하나의 컨소시엄으로 프로젝트에 참여하거나 각각의 기술별로 입찰하여 참여할 수 있도록 하며, 미리 컨소시엄을 구성하여 입찰에 참여하는 경우에는 입찰 시스템에서 하나의 입찰자로 간주하고, 기술별로 입찰에 참여하는 경우에 인터넷 입찰 시스템에서 이들 기술들을 그룹화한 후 하나의 컨소시엄으로 입찰에 참여하도록 하여 기술 모자이크가 가능하다.
Patent KR-20010112961-A (KR)
Title: A method for communication two video display system using a DDC protocal
Inventor: KO GYEONG PIL
IPC: G06F13/14
Filed: 2000-06-15
Abstract: The invention relates to a torsional vibration damper consisting of at least two circular elements which can be twisted in relation to each other against the action of at least one energy storing device which acts in the direction of circumference.
Patent KR-20010114005-A (KR)
Inventor: CHAE SU GIL
IPC: B29C33/00
Filed: 2000-06-20
Abstract: 본 발명은 광페룰 슬리브 제조용 금형구조에 관한 것으로, 광페룰 슬리브를 성형하는 과정에서 세라믹의 밀도가 균일하고 불량률이 저감되어 품질이 향상되도록 한 광페룰 슬리브 제조용 금형구조를 제공하기 위하여, 사출기의 일측에 결합되고 그 중앙에 원료주입홀(212)이 관통된 제 1금형부재(200)와; 상기 제 1금형부재(200)와 대향되는 접촉면상에 복수 개의 핀삽입홀(312)이 관통되며, 상기 핀삽입홀내에 구성되어 이 핀삽입홀내에 투입되는 원료에 의해 광페룰 슬리브가 성형되도록 하는 동시에 이와 같이 성형된 광페룰 슬리브를 배출시키는 이젝트핀장치(500)가 구비된 제 2금형부재(300)로 이루어진 광페룰 슬리브 제조용 금형에 있어서, 상기 이젝트핀장치(500)는 후단이 제 2금형부재(300)의 내측 이젝트핀지지판에 고정되고 그 선단부가 핀삽입홀(312)내에 위치되는 환봉 형상의 부재로 형성되며, 광페룰 슬리브의 관통공이 형성되도록 그 외경이 관통공의 직경과 일치되게 형성된 지지부재(510)와; 상기 지지부재(510)의 외주면에 전후방향으로 미끄럼 이동가능하게 삽입 설치되는 원통형 부재의 후단에 걸림링(522)이 형성된 이젝트부재(520)와; 상기 이젝트부재(520)의 후단 면에 접촉되어 탄성반발력을 인가시키도록 상기 지지부재(510)의 후단부에 삽입 설치되는 탄성부재(530)가 포함되어 구성된 것이다.
Patent KR-20000054812-A (KR)
Inventor: JUNG WOON
IPC: G08B29/00
Filed: 2000-06-26
Abstract: PURPOSE: A method and system for sensing a wireless security is provided to quickly manage an emergency situation by transmitting a message regarding the emergency situation to a briefing room or a police patrol car. CONSTITUTION: A sensor(10) senses an emergency situation occurred in a manless security range and transmits a sensing signal to a control unit(20). A control unit(20) receives the sensing signal to the emergency situation from the sensor(10) and transmits the received sensing signal to a wireless multi transmitting and receiving board(30). The wireless multi transmitting and receiving board(30) transmits a message for informing the sensing signal to a briefing room or a police patrol car to the control unit(20). The control unit(20) transmits the emergency situation to a briefing room or a police patrol car through a SMS wireless message.
Patent KR-20000058731-A (KR)
Inventor: SIM SANG SU
IPC: A63F13/30
Filed: 2000-06-27
Abstract: PURPOSE: An operating system for computer game league is provided which reflects users' opinion so that it is helpful in developing more complete game. CONSTITUTION: The operating system for computer game league comprises the parts of: a game league operating system(GLOS) server wherein a game invention system(GIS) control part, an integration ranking system(IRS) control part, a GLOS control part that is connected to the GIS and the IRS control part to control operation of game league and a GLOS database that is connected to the GLOS control part to store data about the game league are placed; more than one group servers for a game team that are connected to the GLOS server through internet to provide a team that participates in a game and receive operating method of game team from the GLOS server; and more than one group servers for a game room which are connected to the GLOS server to receive a request for a game space from the GLOS server and provided the game space to the GLOS server.
Patent KR-20020004227-A (KR)
Title: welded pipe interanl bead cutting machine
Inventor: KONG WON IL
IPC: B23C3/12
Filed: 2000-07-04
Abstract: PURPOSE: A device for cutting the welded bead on the inner face of a welded pipe is provided to prevent the delay of a process due to a bead chip by completely removing the bead chip during washing, to avoid an accident by automating bead chip cutting process, and to improve economical efficiency by shortening a process. CONSTITUTION: A bead cutter comprises: a main holder(10) having a bead chip discharge outlet(15); a saddle(20) connected to the bead chip discharge outlet; a hydraulic cylinder(30) fixed in a lower portion of the main holder; an upper guide(50) having a guide unit and a bead chip discharge outlet; an upper cutter(51) installed on the upper face of the guide unit of the bead chip discharge outlet; a lower slider(40) having a bead chip outlet; and a lower cutter(41) installed facing the upper cutter to cut a bead chip at the interface of the upper guide and the lower slider. Therefore, the bead chip is removed completely.
Patent KR-20010082507-A (KR)
Title: Reflector, method of fabricating the same, reflective display device comprising reflector, and method of fabricating the same
Inventor: KARASAWA TAKESHI
IPC: G02F1/1335
Filed: 2000-07-10
Abstract: PURPOSE: A reflector plate, a reflection type display device possessing the reflector plate and a manufacturing method thereof are provided to achieve excellent contrast characteristics and paper white property. CONSTITUTION: The reflector has a substrate on which an integrated columnar part(13a) consisting of a plurality of minute columns each independently formed or partly joined as a basic unit is formed into a plurality of structural bodies(12) of recesses and projections, and has a light-reflecting thin film(15) applied on the structural bodies(12) of recesses and projections. Thereby, the incident light can be scattered or reflected not in the regular reflection direction but in the front direction or the like and the obtained reflector shows excellent contrast characteristics and paper white property.
Patent KR-20020006324-A (KR)
Title: Method growing green onion
Inventor: LEE YOUNG BUM
IPC: A01G1/00
Filed: 2000-07-12
Abstract: PURPOSE: A method for cultivating large green onions is provided to maximize commercial value of the green onions, to improve productivity, to minimize the amount of garbage by producing white part of the green onion only, and to increase applicability of the white part of the green onions by cultivating in diverse manners. CONSTITUTION: The method for cultivating large green onions is comprised of the steps of transplanting a young green onion seedling into a seed plot box, covering a grown seedling with a growth supporting tube having an air permeable wall, whose top and bottom are open, and preventing the light from entering through the growth supporting tube. Preferably, the large green onion cultivation is performed inside the facility without sunlight, such as the bare ground or rain shelter house. Also, the internal radius of a growth regulating tube can be varied depending on a desired length or thickness of the white part of the green onions under cultivation.
Patent KR-20000072052-A (KR)
Inventor: JUNG UN
IPC: G06F17/40
Filed: 2000-07-14
Abstract: PURPOSE: A schedule management method and system on the internet are provided for automatically managing a schedule in the internet and transferring the schedule to a mobile communication terminal. CONSTITUTION: A user is connected with an internet schedule managing service in the internet. The user inputs an ID and password An inputted ID and password are checked, and a user's internet schedule managing service connection is allowed(S10). The system searches schedule to transmit(S30). The message is transferred to a SMS network(S40). The SMS network transfers message to a mobile communication terminal of a user(S60).
Patent KR-20020007019-A (KR)
Title: A method of seeking help and seeking work using internet
Inventor: LEE MYEONG HO
IPC: G06Q99/00
Filed: 2000-07-14
Abstract: PURPOSE: A method for offering a job and looking for the job using an Internet communication network is provided to allow a member offering and hunting the job to select easily a person to employ and an enterprise to interview by providing the members with customized information according to a condition required by the members. CONSTITUTION: A terminal(100) of member hunting a job allows a job hunter to input a condition including job hunting information and to confirm job offer information that satisfies the corresponding condition through an Internet communication network(300). A terminal(200) of member offering the job allows a person offering the job to input the condition including job offer information and to confirm the job hunting information that satisfies the corresponding condition through the Internet communication network(300). A web server(400) controls an operation of whole system. A database(500) stores the information inputted by the members hunting and offering the job. A retrieval system(600) retrieves data stored in the database(500) according to the condition inputted by the members hunting and offering the job. In case that the members hunting and offering the job want to manufacture an image profile, an image server system(700) provides an image input program and an image viewer so as to manufacture the image profile.
Patent KR-20020009186-A (KR)
Title: Wafer carrier used in a back-end process of a wafer
Inventor: KIM SANG YONG
IPC: H01L21/68
Filed: 2000-07-25
Abstract: PURPOSE: A wafer carrier used in a back-end process of a wafer is provided to transfer easily a wafer carrier from a clean room to an outside by improving a structure of the wafer carrier. CONSTITUTION: A wafer carrier(200) has a carrier box(210) for forming main body. A wafer cassette for loading a wafer is mounted in the carrier box(210). A door(220) is adhered to a front face of the carrier box(210). The door(220) and the carrier box(210) are sealed to transfer stably the wafer carrier(200) from a clean room to the outside. A gasket is formed on an outer circumference of an inner side of the door(220). The door(220) is combined with the carrier box(210) by a combination device(230). An inside of the wafer carrier(200) forms a vacuum by the gasket. The combination device(230) is formed with a fixing plate and an elastic hook portion. A flange(240) is formed on an upper face of the carrier box(210). One or more projection portion(254) is formed on the upper face of the carrier box(210) in order to stack two or more carrier boxes.
Patent KR-20020012955-A (KR)
Inventor: JUNG YONG JIN
IPC: H01L21/82
Filed: 2000-08-09
Abstract: PURPOSE: A method for etching a fuse cutting hole is provided to simplify a manufacturing process by continuously etching an insulation layer and a polysilicon layer in an etch apparatus by an in-situ method, and to uniformly maintain the thickness of the insulation layer left on a fuse by using the polysilicon layer as an etch stop layer. CONSTITUTION: A plurality of insulation layers on a bit line fuse cutting hole are selectively etched in the apparatus for etching the insulation layer by using a plate polysilicon layer(112) as an etch stop layer. The plate polysilicon layer exposed by etching the insulation layer in the etch apparatus is etched.
Patent KR-20020013066-A (KR)
Title: A method for preparation of cinnamic acid derivatives
Inventor: BAEK SEONG IN
IPC: C07C51/02
Filed: 2000-08-10
Abstract: PURPOSE: A method for preparing a cinnamic acid derivative is provided, which uses cheap reaction materials, comprises simple process, and can be applied to the industrial production easily. CONSTITUTION: The method comprises the steps of reacting a benzene derivative of the formula 2 with acrylic acid in the presence of a base and a dichlorobistrialkylphosphine-Pd complex catalyst ((R'3P)2PdCl2) to obtain a cinnamic acid derivative represented by the formula 1, wherein R is H or methoxy group; and R' is an alkyl group of C1-C4. The content of the Pd-complex catalyst is 0.000001-1 mol% based on the benzene derivative, and is preferably dichlorobistriisopropylphosphine-Pd complex or dichlorobistri(t-butyl)phosphine-Pd complex. The content of acrylic acid 1-5 equivalent based on 1 equivalent of the benzene derivative. The content of the base is 0.5-3 equivalent based on 1 equivalent of the benzene derivative and is selected from the group consisting of anhydrous sodium carbonate, anhydrous potassium carbonate and sodium hydrogen carbonate.